GLI L4-2.0L Turbo (CCTA) (2008)
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Replace the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130).
If the specified value was obtained:
Checking voltage supply
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Turn the ignition switch ON
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Using a multimeter, check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector terminal
1 to engine ground.
Specified value: Battery voltage.
If the specified value was Not obtained:
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Check the wiring for an open, high resistance, short circuit to each other, or Ground (GND).
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking Ground (GND) activation
If the manufacturers test box is being used, perform the following step.
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Install the test box.
If the manufacturers test box is not being used, perform the following step.
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Remove the Motronic Engine Control Module (ECM) (J623).
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Using a multimeter, check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector terminal
to the Motronic Engine Control Module (ECM) (J623) electrical harness connector terminal for an open circuit according to the chart below.
Specified value: 1.5 ohms max.
If the specified value was Not obtained:
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Check the wiring for an open or high resistance.
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply was OK:
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Replace the Motronic Engine Control Module (ECM) (J623).
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Install the right vehicle floor cover.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to --> [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09.
2. If necessary, erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
